SquareTrade has surveyed 30,000 laptops. The result shows that netbooks has 20 per cent more hardware failures than laptops with a big screen. Also, one in three machines die in a matter of three years.
The failure rates according to the article at The Register are:
Acer – 23.3%
Apple – 17.4%
Dell – 18.3%
HP – 25.6%
Lenovo – 21.5%
Sony and Toshiba – between 15.6% to 17.4%
Premium machines only have an 18.1% failure rate. SquareTrade notes that Netbooks are new in the market so it will be interesting to follow how reliable they are over the years.
Source: The Register

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Hmm… Since the study was by a warranty provider they don’t really shed any light on the specifics of the malfunction…
I would love to know percentages that do NOT take into account hard drive failures (the single most common hardware issue) especially since any manufacturer including Apple have all probably used the same drives from time to time. I’d love to see some data on motherboard failures and actual design flaws.
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Missing from your report is the number #1 mfg: Asus
http://www.engadget.com/2009/11/17/laptop-reliability-survey-asus-and-toshiba-win-hp-fails/